A power output shaft with four anti-loosening and two anti-falling preventions for a screw drilling tool
A technology for power output shafts and screw drilling tools, which is applied in the direction of driving devices, drill pipes, and drill pipes for drilling in boreholes. problem, to achieve the effect of directional operation, uniform radial force and improved service life
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[0013] The specific content of the present invention will be described below in conjunction with the accompanying drawings and specific implementation details.
[0014] Such as figure 1 As shown, a power output shaft of a screw drilling tool with four anti-loosening and double anti-falling includes a main shaft 1, a bearing segment housing 4 located outside the main shaft, and a centralizer 8 located outside the bearing segment housing. The main shaft and the bearing segment housing are An upper radial bearing 3, a rolling bearing group 7 and a lower radial bearing 12 are provided.
[0015] The main shaft 1 and the bearing housing 4 on the outer side of the main shaft are connected through the housing lock nut 13, the upper locking nut 2 is arranged between the main shaft 1 and the upper radial bearing 3, and the upper locking nut 2 is arranged between the main shaft 1 and the upper radial bearing 3 and the rolling bearing group 7 A semicircular key 5 is provided, a cylindric...
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